/* \brief Handles archetecture-specific initialization for i586.
*
* This function initializes various tables, paging, and the initial heap,
* various timers, then passes the locations of modules and elf info (if any)
* to \ref kmain.
*
* @param mboot The multiboot header passed by a compliant bootloader.
* @param blarg At the moment, the initial stack placement. This parameter
* is unused and will be removed soon.
* @param magic The multiboot header checksum.
*/
void arch_init( multiboot_header_t *mboot, int blarg, int magic ){
void *modules = 0;
void *elfinfo = 0;
init_serial( );
// Take care of multiboot stuff...
if ( magic != 0x2badb002 )
panic( "Need multiboot-compliant bootloader to boot Helix kernel.\n" );
if ( mboot->flags & MULTIBOOT_FLAG_ELF )
elfinfo = &mboot->elf_headers;
if ( mboot->flags & MULTIBOOT_FLAG_MODS && mboot->mods_count ){
modules = *(int **)mboot->mods_addr;
early_placement = *(int *)(mboot->mods_addr + 4);
}
// Set up memory utils
init_tables( );
init_paging( mboot->mem_lower + mboot->mem_upper );
kheap = kmalloc_early( sizeof( mheap_t ), 0 );
init_heap( kheap, kernel_dir, 0xd0000000, PAGE_SIZE * 32 );
init_timer( );
kmain( 0, modules, elfinfo );
while( 1 ) asm volatile( "hlt" );
}
uint32 kmalloc_early_align(uint32 size)
{
if(!initialized)
panic("kmalloc_early_align: no base address initialized\n");
// prevent page alignment if the allocation size is zero
if(!size)
return NULL;
// is our placement address not page aligned?
if(currentBase & ~PAGE_ALIGN)
{
currentBase &= PAGE_ALIGN;
currentBase += PAGE_SIZE;
}
// just call the regular early kmalloc, which will act on the page
// aligned placement address
return kmalloc_early(size);
}
